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KNX modules

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KNX power supply

The KNX-PS640 power supply unit enables the KNX bus to be supplied with system voltage (SELV). The output with integrated choke makes it possible to separate the power supply from the KNX bus communication line.


  • wide input voltage range: 195…265 V AC (50/60 Hz)
  • output voltage for the bus: 28…30 V DC
  • short-circuit protection for AC power input
  • short-circuit and overload protection for DC power output
  • LED indicators of power supply operating status
  • installation in electrical cabinets, on DIN rail (35 mm)
The actual appearance of the products may differ from the presented images. Product descriptions are provided in the web service for information purposes only.


updated: 2019-11-04
124 KB


EU declaration of conformity
updated: 2020-01-28
511 KB
Other certificates
updated: 2020-01-28
162 KB

Technical Data

IP code
Supply voltage
195…265 V AC, 50-60 Hz
Maximum power consumption
1,5 W
Rated output voltage
30 V, 28…30 V SELV
Output current
640 mA
Overload report current
900 mA
Short-circuit current
1,3 A
Hold up time
200 ms
Maximum tightening torque
0,5 N·m
Temperature range for storage / transport
Number of units on DIN rail
Certificate of conformity
nr 324/14033/17
Maximum cross-section of wire
2,5 mm²

Information materials


2leaflet - end user

3leaflet - installer

4technical data

5product data sheet

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